/**
  * Fetches the data from the persistent data storage.
  * @return array list of data items
  */
 public function fetchData()
 {
     $this->items = Rights::getAuthorizer()->getAuthItemParents($this->parent->name, $this->type, null, true);
     return parent::fetchData();
 }
 /**
  * Fetches the data from the persistent data storage.
  * @return array list of data items
  */
 public function fetchData()
 {
     $this->items = Rights::getAuthorizer()->getAuthItemChildren($this->parent->name, $this->type);
     return parent::fetchData();
 }